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http://dx.doi.org/10.5695/JKISE.2011.44.4.125

Oxidation of Hot Pressed Cr2AlC Compounds at 900-1200℃ for Up to 50 Hours in Air  

Lee, Dong-Bok (School of Advanced Materials Science & Engineering, Sungkyunkwan University)
Publication Information
Journal of the Korean institute of surface engineering / v.44, no.4, 2011 , pp. 125-130 More about this Journal
Abstract
$Cr_2AlC$ compounds were synthesized by hot pressing, and oxidized between 900 and $1200^{\circ}C$ in air for up to 50 hours. They oxidized to a thin $Al_2O_3$ layer containing a small amount of $Cr_2O_3$with the liberation of carbon as CO or $CO_2$ gases. The consumption of Al to form the $Al_2O_3$ layer led to the depletion of Al and enrichment of Cr just below the $Al_2O_3$ layer, resulting in the formation of an underlying $Cr_7C_3$ layer. As the oxidation temperature and time increased, the $Cr_7C_3$ oxide layer and the underlying $Cr_7C_3$ layer thickened. The oxidation resistance of $Cr_2AlC$ was generally good due to the formation of the $Al_2O_3$ barrier layer.
Keywords
Chromium; Aluminum; Carbon; Carbide; Oxidation;
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1 Z. Lin, M. Zhou, Y. Zhou, M. Li, J. Wang, J. Appl. Phys., 99 (2006) 076109.   DOI
2 J. Y. Wang, Y. C. Zhou, Z. J. Lin, F. L. Meng, F. Li, Appl. Phys. Lett., 86 (2005) 101902.   DOI
3 W. Tian, P. Wang, Y. Kan, G. Zhang, J. Mater. Sci., 43 (2008) 2785.
4 T. M. Besmann, N. S. Kulkarni, K. E. Spear, J. Am. Ceram. Soc., 89 (2006) 638.   DOI   ScienceOn
5 I. Barin, Thermochemical Data of Pure Substances (VCH, Germany, 1989) 48.
6 J. M. Schneider, Z. Sun, R. Mertens, F. Uestel, R. Ahuja, Solid State Commun., 130 (2004) 445.   DOI   ScienceOn
7 R. Prescott, M. J. Graham, Oxid. Met., 38 (1992) 2.
8 Z. Lin, Y. Zhou, M. Li, J. Wang, Z. Metallkd., 96 (2005) 291.   DOI
9 Z. Lin, Y. Zhou, M. Li, J. Mater. Sci. Technol. 23 (2007) 721.
10 W. Tian, P. Wang, G. Zhang, Y. Kan, Y. Li, D. Yan, Scripta Mater., 54 (2006) 841.   DOI